If you still eat in McD -- may I suggest read this article:
"The Chicken Which Should be Banned"

"dimethylpolysiloxane, an anti-foaming agent made of silicone, in your chicken
dishes"
"tertiary butylhydroquinone (TBHQ), a chemical preservative so deadly that just
five grams can kill you"
"Only 50 percent of a McNugget is actually chicken. The other 50 percent
includes corn derivatives, sugars, leavening agents and completely synthetic
ingredients."